@Article{	  Griebel.Thurner:1993*1,
  author	= {M. Griebel and V. Thurner},
  title		= {The efficient solution of fluid dynamics problems by the
		  combination method},
  journal	= {Int. J. Num. Meth. for Heat and Fluid Flow},
  volume	= 5,
  pages		= {251--269},
  annote	= {article},
  year		= {1993}
}